12.22.170 Concurrency administration – Procedure.
A. The city shall develop and maintain a concurrency monitoring system based upon a computer traffic forecasting model and intersection operations model to monitor the level of service of signalized intersections of classified streets.
1. The monitoring system shall consider existing and proposed capacities of arterial streets and intersections.
2. The most recent concurrency analysis will be the beginning point for each succeeding concurrency analysis.
3. The cost of developing and maintaining the concurrency monitoring system shall be funded through development review fees based upon the trip generation of the development activity.
4. The concurrency monitoring system may be administered by city staff or a consultant.
5. The applicant shall pay to the city a fee for the city’s preparation of a concurrency evaluation.
6. The amount of the fee shall be as established in Chapter 3.104 LMC and is to be paid at the time of transportation concurrency application submittal. The fee shall vary based on the number of new peak hour trips produced by the development. The applicant shall be subject to payment of additional fees for any subsequent revisions to the concurrency analysis.
7. Additional fees may be required for revisions as an additional proportion of the original fee depending on the effort involved to revise the concurrency analysis. Any upward deviation from the estimated traffic impact shall require at least one of the following:
a. A finding that the additional concurrency sought by the developer through a revised application is available to be reserved by the project;
b. Mitigation of the additional impact under SEPA;
c. Revocation of the concurrency approval.
B. In performing the concurrency evaluation, the city shall determine the impact of the traffic generated by the proposed development activity on the city’s transportation system. The evaluation shall be based on data generated by the city, by professional associations, by the applicant, and if needed, by independent analysis. The city shall examine the data to verify that:
1. The density assumptions for the proposed project are consistent with the underlying zoning.
2. Existing and projected trip generation is consistent with the latest version of the ITE Trip Generation Manual or documented trip generation for uses not typical of uses in the Manual.
C. Level of service calculations for all signalized arterial intersections affected by the development are based upon the cumulative trip generation of previously approved applications, the city’s current six-year TIP and trips generated by the proposed development. The city shall determine if the capacity of the city’s road facilities, plus the capacity that is or shall be used by all existing, reserved, and approved development, can be provided while meeting the LOS standards set forth in this chapter.
D. Technical provisions for concurrency evaluations shall be prepared in the following format:
1. Project description will be provided by the applicant in enough detail to accurately determine the scope of analysis required.
2. Analysis scope will be determined by city after consultation with affected departments.
3. The city, based on the information supplied by the applicant, will determine project trip generation. If the applicant provides a detailed trip generation study, that data may be used for concurrency analysis at the discretion of the director.
4. Project traffic distribution will be determined by the city, consistent with the most current and updated city traffic-forecasting model.
5. Traffic volumes at existing intersections that include background traffic will be maintained by the city.
6. The city will include appropriate background and pipeline traffic at each affected intersection to obtain a revised traffic assignment for affected roadways and intersections.
7. The city may at its discretion issue concurrency certificates based upon estimated available capacity and combine multiple concurrency evaluations into a single test for updating the city traffic-forecasting and operational models.
8. The city, in compliance with the 2000 version of the Highway Capacity Manual, will complete capacity analysis, using its chosen software.
9. After completion of the capacity analysis, the city shall prepare the final concurrency certificate. (Ord. 3153 § 3, 2015)